CSC373/406: Example: Pass by Value [5/8]

• All parameters in C are passed by value
• Values of the variables in the calling function are copied into the parameters of the called function.

file:square2.c [source]

00001: #include <stdio.h> 00002: // prototypes 00003: void square(int numb); 00004: int main() 00005: { 00006: int val = 3; 00007: 00008: square(val); 00009: 00010: printf("val = %d\n", val); // prints 3 (not 4) 00011: 00012: return 0; 00013: } 00014: 00015: void square(int numb) 00016: { 00017: int sq; 00018: 00019: numb++; // 'numb' MODIFIED HERE to 4 00020: sq = numb * numb; 00021: printf("sq = %d\n", sq); // prints 16 00022: } 00023: 00024: