Right Triangle Program
Hello to all. Hope everyone is having a good night. I am turning to the message board because I don't know what any of these error messages mean. Hopefully someone out there can help. This program is supposed to calculate the area of a triangle and tell if it is a right triangle or not. Any help is always appreciated.
John
Can anyone help me out or point me in the right direction.
Calculate area of a triangle and tell if its a right triangle or not using a switch
statement. I am getting error messages on lines
righttriangle.c:45: error: expected expression before âelseâ
righttriangle.c:57: error: expected expression before âelseâ
righttriangle.c:126:9: warning: multi-character character constant
righttriangle.c: In function âcalAreaâ:
righttriangle.c:175: error: âfâ undeclared (first use in this function)
righttriangle.c:175: error: (Each undeclared identifier is reported only once
righttriangle.c:175: error: for each function it appears in.)
righttriangle.c:175: error: expected â;â before â}â token
righttriangle.c: In function âmainâ:
righttriangle.c:175: error: expected declaration or statement at end of input
righttriangle.c:175: error: expected declaration or statement at end of input
righttriangle.c:24: warning: unused variable âhypotenuseâ
righttriangle.c: In function âcalLeg1â:
righttriangle.c:161: warning: control reaches end of non-void function
righttriangle.c: In function âcalLeg2â:
righttriangle.c:166: warning: control reaches end of non-void function
righttriangle.c: In function âcalHypotenuseâ:
righttriangle.c:171: warning: control reaches end of non-void function
righttriangle.c: In function âcalAreaâ:
righttriangle.c:175: warning: control reaches end of non-void function
righttriangle.c: In function âmainâ:
righttriangle.c:175: warning: control reaches end of
Code:10 #include <stdio.h> 11 #include <math.h> 12 13 /* Function Prototypes */ 14 void printMenu(); 15 void float calLeg1(float leg2, float hypotenuse); 16 17 void float calLeg2(float leg1, float hypotenuse); 18 void float calHypotenuse(float leg1, float leg2); 19 void float calArea(float leg1, float leg2); 20 21 /* Main Function */ 22 int main() 23 { 24 /* InitIalizers for legs and hypotenuse */ 25 float leg1 = -1.0, leg2 = -1.0, hypotenuse = -1.0; 26 27 /* Sentinal Controlled loop initializers */ 28 int selection = 0; 29 int EXIT_VAL = 10; 30 31 /* Beginning of sentinal controlled loop */ 32 while(selection != EXIT_VAL) 33 { 34 /* Print Menu first */ 35 printMenu(); 36 scanf("%d", &selection); 37 38 /* Switch on menu options */ 39 switch(selection) 40 { 41 /* Input leg1 */ 42 case '1': 43 {printf( "Enter leg1:"); 44 scanf( "%f",&leg1 ); 45 if ( leg1 > 0) 46 else printf( "Please enter a positive value for leg1\n"); 47 /* Did they enter a positive number? */ 48 49 break; 50 } 51 52 /* Input leg2 */ 53 case '2': 54 {printf( "Enter leg2:"); 55 scanf( "%f",&leg2 ); 56 57 if ( leg2 > 0) 58 else printf("Please enter a positive number:"; 59 /* Did they enter a positive number? */ 60 break; 61 } 62 63 /* Input hypotenuse */ 64 case '3': 65 {printf( "Enter hypotenuse:"); 66 scanf( "%f",&hypotenuse ); 67 if ( hypotenuse > 0) 68 printf( "Please enter a positive value for the hypotenuse\n"); 69 /* Did they enter a positive number? */ 70 break; 71 } 72 73 /* Calculate leg1 */ 74 case '4': 75 { 76 /* If enough values have been inputed to solve for it */ 77 if leg1 = calLeg1(leg2, hypotenuse) 78 else printf("Not enough information:"); 79 80 81 break; 82 } 83 84 /* Calculate leg2 */ 85 case '5': 86 { 87 /* If enough values have been inputed to solve for it */ 88 if leg2 = calLeg2(leg1, hypotenuse 89 else printf("Print need more information:"); 90 break; 91 } 92 93 /* Calculate hypotenuse */ 94 case '6': 95 { 96 /* If enough values have been inputed to solve for it */ 97 if hypotenuse = calHypotenuse(leg1, leg2) 98 else printf("Need more information:"); 99 break; 100 } 101 102 /* Calculate area and print */ 103 case '7': 104 { area = ( leg1 * leg2 )/2; 105 printf("The area is %f\n",area); 106 /* If enough values have been inputed to solve for it 107 * a little more complexe than the other calculates */ 108 break; 109 } 110 111 /* Determine if values are a right triangle or not */ 112 case '8': 113 { if ( leg 1 * leg1 ) + (leg2 * leg2) = ( hypotenuse * hypotenuse ) 114 printf("This is a right triangle\n"); 115 else printf("This is not a right triangle\n"); 116 /* Make sure you handle all possible cases */ 117 break; 118 } 119 120 case '9': 121 {printf( "The values are %f\n%f\n%f",leg1,leg2,hypotenuse); 122 /* Display current values for leg1, leg2, and hypotenuse */ 123 break; 124 } 125 126 /* Exit Case */ 127 case '10': 128 { 129 break; 130 } 131 132 /* If invalid value entered */ 133 default: 134 { 135 printf("Invalid Value entered please select again!\n"); 136 } 137 } 138 return 0; 139 } 140 141 /* Menu Printing Function */ 142 void printMenu() 143 { 144 /* Do work for menu 145 * 1. Input value for leg1 146 * 2. Input value for leg2 147 * 3. Input value for hypotenuse 148 * 4. Calculate leg1 149 * 5. Calculate leg2 150 * 6. Calculate hypotenuse 151 * 7. Calculate area of right triangle 152 * 8. State if values entered is a real right triangle 153 * 9. Display current values of leg1, leg2, and hypotenuse 154 * 10. Exit */ 155 } 156 157 158 float calLeg1(float leg2, float hypotenuse) 159 { 160 /* Calculate value for leg1 and return it */ 161 } 162 163 float calLeg2(float leg1, float hypotenuse) 164 { 165 /* Calculate value for leg2 and return it */ 166 } 167 168 float calHypotenuse(float leg1, float leg2) 169 { 170 /* Calculate value for hypotenuse and return it */ 171 } 172 173 float calArea(float leg1, float leg2) 174 { 175 /* Calculate area for triangle and return it */f}
